... >1012Bending strength(RT)>35mpaThe compressive strength(RT)>200mpaThe hexagonal BN ceramic density is small (2.27 g/cm3) hardness is ... , can undertake all kinds of mechanical produce, easy to make ceramic components in exact size . By turning, milling, planing, drilling, etc, ... , also can be used as padding between metal and ceramic to make bearing. The lubrication performance better than other ...